Yamaha Tracer MT09TRAH 2017 Service Manual page 116

Refer to "GENERAL CHASSIS (2)" on page
4-6.
• Passenger seat/Rider seat
Refer to "GENERAL CHASSIS (1)" on page
4-1.
• Fuel tank cover
Refer to "GENERAL CHASSIS (3)" on page
4-13.
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Air filter case
Refer to "GENERAL CHASSIS (3)" on page
4-13.
• Air cut-off valve
Refer to "AIR INDUCTION SYSTEM" on
page 7-15.
• Radiator
Refer to "RADIATOR" on page 6-1.
2. Remove:
• Ignition coils
• Spark plugs
• Cylinder head cover
• Cylinder head cover gasket
Refer to "CAMSHAFTS" on page 5-9.
3. Remove:
• Timing mark accessing bolt "1"
• Crankshaft end cover "2"
1
4. Measure:
• Valve clearance
Out of specification  Adjust.
Valve clearance (cold)
Intake
0.11–0.20 mm (0.0043–0.0079 in)
Exhaust
0.26–0.30 mm (0.0102–0.0118 in)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the crankshaft counterclockwise.
b. When piston #1 is at TDC on the compres-
sion stroke, align the TDC mark "a" on the
generator rotor with the generator rotor cover
mark "b".
TIP
TDC on the compression stroke can be found
when the camshaft lobes are turned away from
each other.
c. Measure the valve clearance with a thickness
2
TIP
• If the valve clearance is incorrect, record the
measured reading.
• Measure the valve clearance in the following
sequence.
Valve clearance measuring sequence
A. Front
3-6
PERIODIC MAINTENANCE
b
a
gauge "1".
Thickness gauge
90890-03180
Feeler gauge set
YU-26900-9
Cylinder #1  #2  #3
1